Salient Aspects of PBP2A-inhibition; A QSAR Study

Title:Salient Aspects of PBP2A-inhibition; A QSAR Study

Volume: 14 Issue: 4

Author(s): Adewale J. Ogunleye*, Gabriel O. Eniafe, Olumide K. Inyang, Benjamin Adewumi and Olaposi I. Omotuyi

Affiliation:

• Centre for Biocomputing and Drug Development, Adekunle Ajasin University, Akungba Akoko,Nigeria

Keywords: PBP2A, MRSA, QSAR, PLS, molecular descriptors, atomic polarizability, charge negative surface area.

Abstract: Background: Inhibition of penicillin binding protein 2A (PBP2A) represents a sound drug design strategy in combatting Methicillin resistant Staphylococcus aureus (MRSA). Considering the urgent need for effective antimicrobials in combatting MRSA infections, we have developed a statistically robust ensemble of molecular descriptors (1, 2, & 3-D) from compounds targeting PBP2A in vivo.

Methods: 37 (training set: 26, test set: 11) PBP2A-inhibitors were submitted for descriptor generation after which an unsupervised, non-exhaustive genetic algorithm (GA) was deployed for fishing out the best descriptor subset. Assignment of descriptors to a regression model was accomplished with the Partial Least Square (PLS) algorithm. At the end, an ensemble of 30 descriptors accurately predicted the ligand bioactivity, IC50 (R = 0.9996, R2 = 0.9992, R2 a = 0.9949, SEE =, 0.2297 Q2 LOO = 0.9741).

Results and Conclusion: Inferentially, we noticed that the overall efficacy of this model greatly depends on atomic polarizability and negative charge (electron) density. Besides the formula derived, the high dimensional model also offers critical insights into salient cheminformatics parameter to note during hit-to-lead PBP2A-antagonist optimization.

Cite this article as:

Ogunleye J. Adewale *, Eniafe O. Gabriel , Inyang K. Olumide , Adewumi Benjamin and Omotuyi I. Olaposi , Salient Aspects of PBP2A-inhibition; A QSAR Study, Current Computer-Aided Drug Design 2018; 14 (4) . https://dx.doi.org/10.2174/1573409914666180516114314